Multi-wear layer composite eva sole

Abstract

This utility model discloses a multi-layered wear-resistant EVA sole, including a foot instep layer. The sole incorporates a shock-absorbing layer and a wear-resistant layer. The shock-absorbing layer utilizes a honeycomb-shaped EVA material support structure with a biomimetic structure to achieve lightweighting. The elastic deformation of the pore walls disperses foot pressure. A high-density design in the heel enhances support stability and prevents excessive deformation. The first and second air cushions in the forefoot and heel are respectively rectangular to accommodate lateral force from the forefoot and circular to accommodate vertical impact from the heel, improving dynamic shock absorption and absorbing the impact force on the foot during exercise, reducing fatigue and injury. The wear-resistant layer is designed in three sections: forefoot, midfoot, and heel. Appropriate materials can be selected for different areas to extend the overall lifespan. The segmented structure, combined with the fastening buckles and insertion holes, and the matching grooves on both sides of the fastening buckles and insertion holes, enhances the connection between the wear-resistant layers. This allows for individual replacement after localized wear, eliminating the need for complete replacement, effectively reducing usage costs and material waste, and balancing practicality and environmental protection.

Description

Technical Field

[0001] This utility model relates to the field of composite shoe sole technology, specifically to an EVA shoe sole with multiple wear-resistant layers. Background Technology

[0002] In the footwear industry, the sole is an important component of shoes, and its performance directly affects the comfort, durability, and safety of the shoes. EVA has become one of the commonly used materials for soles due to its lightweight, good elasticity, excellent cushioning performance, and low cost. As consumers' requirements for shoe performance continue to increase, especially the demand for abrasion resistance, durability, and multi-functionality of soles, traditional EVA soles and EVA soles with a single abrasion layer are no longer able to meet the needs of diverse usage scenarios.

[0003] Existing technologies also involve layering the sole and adding air cushions to increase foot comfort and improve the overall wear resistance and lifespan of the sole. However, after layering, if the wear layer is severely damaged only in the forefoot, the entire wear layer must be removed and replaced. This not only wastes materials in the unworn areas and increases the user's cost, but also exacerbates the environmental burden due to the non-degradable nature of rubber, adhesives, and other components in the waste materials. Utility Model Content

[0004] The purpose of this invention is to provide an EVA sole with multiple wear-resistant layers to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a multi-abrasion-resistant composite EVA sole, comprising a foot instep layer, rubber buckles, a shock-absorbing layer, and an abrasion-resistant layer. Four sets of rubber buckles are provided on both sides of the foot instep layer. The shock-absorbing layer is installed on the foot instep layer. The bottom end of the abrasion-resistant layer is bonded to the shock-absorbing layer. The foot instep layer, the shock-absorbing layer, and the abrasion-resistant layer are connected by rubber buckles. A support body is provided on the shock-absorbing layer. The support body is connected to the foot instep layer. A first air cushion and a second air cushion are respectively provided on the forefoot and heel of the support body.

[0006] Preferably, the support body is honeycomb-shaped, and the density of the rear foot of the support body is higher than that of the forefoot.

[0007] Preferably, the cross-sectional shapes of the first air cushion and the second air cushion are rectangular and circular, respectively.

[0008] Preferably, the wear-resistant layer includes a front wear-resistant layer, a middle wear-resistant layer connected to the rear side of the front wear-resistant layer, and a rear wear-resistant layer connected to the rear side of the middle wear-resistant layer. Fixing holes are provided on both sides of the top of the front and rear wear-resistant layers, and the fixing holes at the top of the front and rear wear-resistant layers cooperate with the rubber buckles on the foot layer. At least two sets of fixing buckles and insertion holes are provided at the connection points of the front, middle, and rear wear-resistant layers. The bottoms of the first and second air cushions are in contact with the tops of the front and rear wear-resistant layers.

[0009] Preferably, the fixing buckle on the rear side of the front wear-resistant layer and the insertion hole on the front side of the middle wear-resistant layer are staggered, and the fixing buckle on the rear side of the middle wear-resistant layer and the insertion hole on the front side of the rear wear-resistant layer are also staggered, and the fixing buckles of the two adjacent layers are directly opposite and fitted with the insertion hole of the other.

[0010] Preferably, each set of fixing buckles is provided with buckles on both the left and right sides, and the insertion hole is provided with slots on both the left and right sides. The size of the slots is the same as the size of the buckles, and the buckles and slots are matched.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This utility model is equipped with a shock-absorbing layer: the internal honeycomb support body achieves lightweighting through a biomimetic structure, while the elastic deformation of the honeycomb pore walls disperses the pressure on the sole of the foot. The higher density design of the heel can specifically enhance the support stability of the heel and avoid excessive deformation. The first air cushion and the second air cushion set in the forefoot and heel respectively, combined with different cross-sectional shapes, the rectangle is suitable for the lateral force of the forefoot and the circle is suitable for the vertical impact of the heel, which further improves the dynamic shock absorption effect, allowing the impact force on the foot during walking and exercise to be absorbed layer by layer, reducing fatigue and the risk of sports injury.

[0013] This invention features a wear-resistant layer: the wear-resistant layer is designed in three sections—front, middle, and rear—allowing for the selection of appropriate wear-resistant materials based on the wear characteristics of different areas, thereby improving the overall wear resistance and lifespan of the sole. Simultaneously, the segmented structure, combined with the connection method of the fixing buckle and the insertion hole, enhances the firmness of the connection between the wear-resistant layers through the matching of the grooves on the left and right sides of the fixing buckle and the left and right sides of the insertion hole. This allows for individual replacement of worn areas without the need for complete replacement, reducing usage costs and material waste, thus balancing practicality and environmental friendliness. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the overall structure of the foot layer, shock-absorbing layer, and wear-resistant layer of this utility model;

[0016] Figure 3This is a schematic diagram of the wear-resistant layer of this utility model;

[0017] Figure 4 This is an enlarged structural diagram of region A of this utility model.

[0018] In the diagram: Foot instep layer-1, rubber buckle-2, shock-absorbing layer-3, support body-31, first air cushion-32, second air cushion-33, wear-resistant layer-4, front wear-resistant layer-41, middle wear-resistant layer-42, rear wear-resistant layer-43, fixing hole-44, fixing buckle-45, buckle-451, insertion hole-46, slot-461. Detailed Implementation

[0019] To further explain the technical solution of this utility model, a detailed description is provided below through specific embodiments.

[0020] Please see Figures 1-2 This utility model provides a multi-layered abrasion-resistant EVA sole, including a foot instep layer 1, rubber buckles 2, a shock-absorbing layer 3, and an abrasion-resistant layer 4. Four sets of rubber buckles 2 are integrally connected to both sides of the foot instep layer 1. The shock-absorbing layer 3 is installed on the foot instep layer 1. The bottom end of the abrasion-resistant layer 4 is bonded to the shock-absorbing layer 3. The foot instep layer 1, shock-absorbing layer 3, and abrasion-resistant layer 4 are connected by the rubber buckles 2. A support body 31 is provided on the shock-absorbing layer 3, and the support body 31 is made of honeycomb EVA material. This support body provides installation limits for the air cushion and forms a double cushioning mechanism, while also reducing the impact on the shock-absorbing layer. The weight is balanced with cushioning, support and comfort performance. The support body 31 has a higher density in the heel than in the forefoot. The support body 31 is connected to the instep layer 1. The support body 31 has a first air cushion 32 and a second air cushion 33 embedded in the forefoot and heel respectively. The cross-sectional shapes of the first air cushion 32 and the second air cushion 33 are rectangular and circular respectively. The rectangular shape is suitable for the cushioning needs when the forefoot exerts lateral force, while the circular shape is more suitable for the shock absorption of vertical impact on the heel. Together with the support body 31, they form a targeted double cushioning to improve the dynamic comfort of different parts of the foot.

[0021] Please see Figures 3-4 In this utility model, the wear-resistant layer 4 includes a front wear-resistant layer 41, a middle wear-resistant layer 42 connected to the rear side of the front wear-resistant layer 41, and a rear wear-resistant layer 43 connected to the rear side of the middle wear-resistant layer 42. The front wear-resistant layer 41 and the rear wear-resistant layer 43 are integrally formed with fixing holes 44 on both sides of their tops. The fixing holes 44 on the tops of the front wear-resistant layer 41 and the rear wear-resistant layer 43 cooperate with the rubber buckles 2 on the foot layer 1, realizing the detachable connection of the foot layer 1, the shock-absorbing layer 3 and the wear-resistant layer 4. At least two sets of fixing buckles 45 and insertion holes 46 are provided at the connection points of the front wear-resistant layer 41, the middle wear-resistant layer 42 and the rear wear-resistant layer 43. The bottoms of the first air cushion 32 and the second air cushion 33 are in contact with the tops of the front wear-resistant layer 41 and the rear wear-resistant layer 43, which enables the shock-absorbing force of the air cushion and the supporting force of the wear-resistant layer to be efficiently transmitted through the contact surface, forming a force linkage.

[0022] The fixing buckle 45 on the rear side of the front abrasion layer 41 and the insertion hole 46 on the front side of the middle abrasion layer 42 are staggered. The fixing buckle 45 on the rear side of the middle abrasion layer 42 and the insertion hole 46 on the front side of the rear abrasion layer 43 are also staggered. The fixing buckles 45 of the two adjacent layers are directly opposite and fitted with the insertion hole 46 of the other, which can evenly distribute the force and tightly connect the abrasion layers 4, taking into account both the connection stability and the flexibility of the sole.

[0023] Each set of fixing buckles 45 has a buckle 451 integrally connected to both sides on the left and right sides, and the insertion hole 46 has a slot 461 on both sides on the left and right sides. The size of the slot 461 is the same as that of the buckle 451, and the buckle 451 and the slot 461 match, which makes the connection between the fixing buckle 45 and the insertion hole 46 tighter and more secure, effectively preventing the layers from loosening or separating during use, and enhancing the stability of the overall structure.

[0024] Working principle:

[0025] First, when the wearer walks, when the foot steps on the sole of the shoe, the honeycomb EVA structure of the forefoot of the support body 31, combined with the first air cushion 32 for flexible cushioning, disperses the lateral force. When the heel hits the ground, the high-density honeycomb EVA support body 31, combined with the second air cushion 33, provides rigid support and absorbs vertical impact, making the wearer feel more comfortable.

[0026] Secondly, the three sections of the forefoot abrasion layer 41, the middle abrasion layer 42, and the rear abrasion layer 43 are tightly connected by staggered fasteners 45 and insertion holes 46. The use of buckles and slots enhances the stability between the forefoot abrasion layer 41, the middle abrasion layer 42, and the rear abrasion layer 43, reducing the possibility of loosening and separation during use. With the natural bending of the foot, the high-wear areas of the forefoot and heel can independently bear friction. When a local area wears out, only the corresponding abrasion layer needs to be replaced, reducing material waste and maintaining the durability of the sole.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-abrasion-resistant composite EVA sole, comprising a foot instep layer (1) and rubber buckles (2), wherein four sets of rubber buckles (2) are provided on both sides of the foot instep layer (1). Its features are: It also includes a shock-absorbing layer (3) and a wear-resistant layer (4). The shock-absorbing layer (3) is installed on the foot layer (1). The bottom end of the wear-resistant layer (4) is bonded to the shock-absorbing layer (3). The foot layer (1), the shock-absorbing layer (3) and the wear-resistant layer (4) are connected by rubber buckles (2). A support body (31) is provided on the shock-absorbing layer (3). The support body (31) is connected to the foot layer (1). The support body (31) has a first air cushion (32) and a second air cushion (33) respectively on the front and back of the heel.

2. The multi-abrasion-resistant composite EVA sole according to claim 1, characterized in that: The support (31) is honeycomb-shaped, and the density of the heel of the support (31) is higher than that of the forefoot.

3. The multi-abrasion-resistant composite EVA sole according to claim 2, characterized in that: The cross-sectional shapes of the first air cushion (32) and the second air cushion (33) are rectangular and circular, respectively.

4. The multi-abrasion-resistant composite EVA sole according to claim 3, characterized in that: The wear-resistant layer (4) includes a front wear-resistant layer (41), a middle wear-resistant layer (42) is connected to the rear side of the front wear-resistant layer (41), and a rear wear-resistant layer (43) is connected to the rear side of the middle wear-resistant layer (42). Fixing holes (44) are provided on both sides of the top of the front wear-resistant layer (41) and the rear wear-resistant layer (43). The fixing holes (44) at the top of the front wear-resistant layer (41) and the rear wear-resistant layer (43) cooperate with the rubber buckles (2) on the foot layer (1). At least two sets of fixing buckles (45) and insertion holes (46) are provided at the connection of the front wear-resistant layer (41), the middle wear-resistant layer (42) and the rear wear-resistant layer (43). The bottom of the first air cushion (32) and the second air cushion (33) are in contact with the top of the front wear-resistant layer (41) and the rear wear-resistant layer (43).

5. The multi-abrasion-resistant composite EVA sole according to claim 4, characterized in that: The fixing buckle (45) on the rear side of the front wear-resistant layer (41) and the insertion hole (46) on the front side of the middle wear-resistant layer (42) are staggered. The fixing buckle (45) on the rear side of the middle wear-resistant layer (42) and the insertion hole (46) on the front side of the rear wear-resistant layer (43) are also staggered. The fixing buckles (45) of the two adjacent layers are directly opposite and fitted with the insertion hole (46) of the other.

6. The multi-abrasion-resistant composite EVA sole according to claim 5, characterized in that: Each set of fixing buckles (45) is provided with buckles (451) on both the left and right sides, and the insertion hole (46) is provided with slots (461) on both the left and right sides. The size of the slots (461) is the same as the size of the buckles (451), and the buckles (451) and slots (461) are matched.

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